# Copyright (c) 2007, Enrico Franchi
# All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of the University of California, Berkeley nor the
#       names of its contributors may be used to endorse or promote products
#       derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

from Foundation import NSNotificationCenter
from PyObjCTools import NibClassBuilder

from linguistics import AVAILABLE_TAG, INSTALLED_TAG, OUTDATED_TAG, INVALID_TAG


class ProgressManager(NibClassBuilder.AutoBaseClass):
    def init(self):
        self.counter = 0
        self.tasks = []
        return self
    
    def awakeFromNib(self):
        notificationCenter = NSNotificationCenter.defaultCenter()
        tags = (AVAILABLE_TAG, INSTALLED_TAG, OUTDATED_TAG)
        for tag in tags:
            name = tag.capitalize() + 'PortsModel'
            notificationCenter.addObserver_selector_name_object_(
                self, 'decrementCounter:', 'refreshed_' + name, None
            )
            notificationCenter.addObserver_selector_name_object_(
                self, 'incrementCounter:', 'refresh_'   + name, None
            )
            
    def decrementCounter_(self, notification):
        self.counter -= 1
        if self.counter <= 0:
            self.counter = 0
            self.progressIndicator.stopAnimation_(self)
            self.loadLabel.setStringValue_('Finished loading data.')
            
    def incrementCounter_(self, notification):
        self.counter += 1
        if self.counter > 0:
            self.progressIndicator.startAnimation_(self)
            self.loadLabel.setStringValue_('Loading data...')